"Until we know where it is, there is always a chance we'll run into it by pure chance before we're ready, or that it will find us before we find it, no matter where we go or what we do," Nin says. "That's why it's best to start by finding where it is; only then can you avoid running into it by accident. If you're worried about bloodshed, should it catch wind of us or should we fall right on top of it by accident, we can always retreat rather than fight."

"And even if it is as you suspect, that it can't go back to where it came from, that don't mean we can't follow the trail it left back to its source. Or at least it will help us narrow our search."